Bicycle-brake.



UNITED STATES PATENT OFFICE.

JAMESJAMIESON, OF HAMILTON, CANADA.

BICYGLE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 633,266, dated September 19, 1899. Application filed September 13, 1893. Serial No. 690,879. No m'odel.)

T0 all w7w7n it 7nay concern:

Be it known that I, JAME S JAMIESQN, a subject of the Queen 01: Great Britain, residing at Hamilton, in the Province of Ontario, Canada, have invented certain new and usefnl Improvements in Bicycle-Brakes; and I do herebydeclare the followingto be a full, elear, and exact description of the same, reference being had to the accompanying drawings, forming a partof this specification, and to the letters of reference niarked thereon.

This invention relates to improvements in brakes, and particularly such as are applied to vehieles adapted to be propelled by the rider, the objects of the invention being to provide a brake which will be simple and neat in design and which is adapted to be operated by the movements of the riders body on the seat or saddle upon-which he is supported, a further object of the invention being to provide a brake of this character Which may be locked against operation easily and conveniently, the vehicle and its seat or saddle being then held in.their normal relative p0- sitions and the brake out of operation.

Referring to the accompanying drawings, Figure lis a detail side elevation of one portion of an ordinary diamond-frame bicycle, showing the seat-post, the saddle, and a section of the rim and tire of the rear wheel With my brake in position ready for use. Fig. 2 is a vertical section taken through the seatpost in a plane from front to rear, showing the relatively movable and stationary parts with the look for holding the parts in fixed relation to each other. Fig. 3 is a detail section at right angles to Fig. 2. Fig. 4 is an elevation of the 1*ocking pin or journal upon which the seat or saddle is directly supported. Fig. 5 is a detail elevationof one of the clamping-washers for securing the saddle to the rocking pin or journal; and Fig. 6 is a corresponding elevation looking at one end of the pin or journal itself, these two views, Fig's. 5 and 6, illustrating the means for adjusting the normal inclination of the saddle t0 suit different riders. Fig. 7 is a detail vertical section of the upper end of the connection between the saddle and brake-rod.

Like letters of reference in the several figures indicate the same parts.

The portion of the frame of the bicycle illustrated is indicated by the letter A, and projecting therefrom and secured thereto-in any usual or ordinary manner is the seatpost B, upon the upper end of which the seat or saddle C is adapted to be supported.

D indicates a section of the rim of the vehicle-wheel, and A the rear braces of the frame. The upper end of the seat-post in the present instance is preferably formed with a transverse circular opening constitnting a bearing E, in which is journaled a preterably relativel y large oylind rical pin or cylinder F. Projeotin g from this cylinder F are two threaded elongationsf, adapted to carry looking-washers G, which washers G are in turn locked and held in place by nuts g and are adapted to clamp between their inner faces and the ends of the cylinder F the side bars or trame H et the saddle C. Notches or recesses G may be formed in the inner faces of the washers G and edge of the cylinder F,

respectively, into which the side bars H of the saddle-frame may fit, and the washers Gr are held in their proper relative positions with respect to the cylinder F by means of the toothed portions G which coperate with correspondingly-toothed portions F on the ends of the cylinder or pin F, as illustrated clearly in Figs. 5 and 6. This construction permits the washers G, together With the saddle, to be set at any desired inclination with respect to the cylinder or pin F, and the washers in addition prevent any lateral movement of the saddle. The cylinder or pin is prevented from rotating by means of a locking-pin K, journaled in the head of the seat-post and adapted to be held in position by a locknut k on its forward end. This lockigpin K passes through a slot F in the cylinder F, preventing undue longitudinal movement, and the top of this slot F, striking the pin, prevents the cylinder fronn rotating except for a short distance.

With a view now to locking the cylinder absolutely against rotation and so securing the saddle rigidly in place upon the seat-post against any rocking movement the locking pin K is provided at its rear end With an enlargement K, one portion of which, 76, is out away, as shown clearly in Fig. 2, and the other portion of which is adapted to turn into are- Fig. 2 it will permit the oylinder F and the seat carried thereby to have a limited rockng or rotary movement; but when tnrned at right angles to this position or given a ha1fturn the head K, passing into the recess F", Will prevent any movement of the cylinder F in .the seat-post, as jnst explained.

To the rear portion of the frame H of the seat or saddle the brake-rod L is pivotaliy eonneoted, preferably by means of a clamp M, formed in two parts to embrace the frame H and secured together by the boit on and nnt, the lower portion of which is bifnroated for the reception of the upper end of the connectingnod L, these parts being held together by the sorew m, fomning a bingo eonneotion. The lower end of the brako 013 eonnoeting rod Lis pivotally connected with a brako-shoe N, which brakeshoe .is preferably pivotally snpported betwoen the rear bracos A of the frame of the machine. The brakerod L may be made adjnstable in any nsnal ou prefe1red manner, 01, as illnstratod, by means of a central couplingL', into which the adjacent ends of the two parts of the b1ake-rods are screwed with right and left threads.

The brake-shoe preferably projects forwardly from the connection with the frame, so as to prevent any binding action, although this is optional, and, in fact, any usnal form of brake-shoo or brake-rod connection therewith may be omployed withont in any wise n1od ifying the other featnres of the invention.

In operation now the rider seated in the saddle may, if he so desires, look the saddle against any rocking movement, or, on the other hand, if he desires t0 ntilize the brake the locking-pin may be tnrned so as to allow thesaddiealimitedrocking movement. Thon by leaning back or shifting his weight to the rear portion of the saddle he may depress the brake-rod and force the brake-shoe into contact with the tire of the wheel, thereby retarding the progress of the vehicle, and When it is desired t0 proceed by an aimost imperceptible movement or s hifting of the woight of his body the brake may be withdrawn from the wheel and the progress of the vehicle no longer retarded.

IIaving thns described my invention, what I daim as 116W, and desire to secure by Letters Patent of the United States of America, is

1. In a vohieie-brake, the combination With the vohiele-frame, the seat-post having a transverse boaring in its upper cm], a cylinder 01' pin journaied in said bearing, a saddle supported by said cylinder 01' pin and a brakeshoe operated by the movement of the saddie in said bearing, of a look interposed directly between the cy1inder 01' pin and the seat-post for locking the1n rigidly togother; substantially as desoribed.

2. In a bicyoie-brako, the ooxnbination with the seatpost having a bearing in its upper and, the cylinder jonrnaled in said bearing, the saddlo carried by said cylinder, and the brake-shoe operated by the tilting of the saddle in said boaring, of a looking-pin journaled in the seat-post and coperating with a reoess in the oy1inder to 1imit the movement of the latter and a projection on said pin and coperating recess in the cylinder for locking the cylinder and saddle against independent movement; snbstantiaily as deseribed.

JAMES JAMIESON.

\Vitnessesz J AMES J. CROW, KING BARTON. 

